Perhaps you should try some spelling variations:
hieu van » thien van, hieu ve
chat xuc » chat huu, cam xuc, chao xu
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
han tri » han tai, van tri, thanh tri
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
va han » va phan, van han, va hanh
thiet » thieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang ma hoi. ((((hieu van) or (lieu va))) or (hieu va)) chat xuc va han tri va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. ((((hieu van) OR (lieu va))) OR (hieu va)) chat xuc va han tri va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. ((((hieu van) or (lieu va))) or (hieu va)) chat xuc va han tri va thiet*.